(1):

(n.) In Engler's system of plant classification, a group of families showing certain structural or morphological relationships. It corresponds to the cohort of some writers, and to the order of many modern systematists.

(2):

(n.) A parcel of rough diamonds of assorted qualities.

(3):

(n.) A number of things or events standing or succeeding in order, and connected by a like relation; sequence; order; course; a succession of things; as, a continuous series of calamitous events.

(4):

(n.) Any comprehensive group of animals or plants including several subordinate related groups.

(5):

(n.) An indefinite number of terms succeeding one another, each of which is derived from one or more of the preceding by a fixed law, called the law of the series; as, an arithmetical series; a geometrical series.

(6):

(n.) A mode of arranging the separate parts of a circuit by connecting them successively end to end to form a single path for the current; - opposed to parallel. The parts so arranged are said to be in series.